Executive Summary

Mobility is becoming ubiquitous now-a-days; there have been tremendous advances in the next generation mobile communication systems recently, thereby, engendering the need to support all the advancements arising from new theories, algorithms, architectures, standards and protocols. Mobility management has been a growing concern in IPv6 with numerous problems originating from roaming between IPv6 access networks and IPv4 access networks owing to ever-growing research. This paper will present an overview of the study on various architectures concerning transition/mobility among IPv6 and IPv4. The study also categorizes the various architectures under the three main transition mechanisms proposed by Next Generation TRANSition (NGTRANS) Work Group (WG).